期刊
JOURNAL OF NANOPARTICLE RESEARCH
卷 12, 期 5, 页码 1645-1654出版社
SPRINGER
DOI: 10.1007/s11051-009-9740-9
关键词
ZnO nanoparticles; Solubility; Aggregate; Toxicity; Zebrafish embryo; Environment; EHS
资金
- National Natural Science Foundation of China [10505024, 20707027, 10875136]
- Chinese Academy of Sciences [KJCX3.SYW.N3]
- Ministry of Science and Technology of China [2006CB705605]
The biological impact of engineered nanomaterials released into the aquatic environment is a major concern. In this work, the properties of ZnO nanoparticles (nano-ZnO, 30 nm) were characterized in a water suspension (E3 medium), and a zebrafish 96-h post fertilization (hpf) embryo-larval test was performed to assess the toxicity of nano-ZnO suspension. Nano-ZnO was found to readily form aggregates with different sizes; small aggregates (142.4-517.7 nm) were still suspended in E3 medium, but large aggregates (> 1 mu m) quickly deposited on the bottom of 24-well plates; nano-ZnO was partially dissolved to Zn species (Zn-(dis)) in E3 medium. In the nano-ZnO suspension, small aggregates, Zn-(dis), and large aggregates might jointly exert influence on the development of zebrafish embryos. The embryo toxicity test revealed that nano-ZnO killed zebrafish embryos (50 and 100 mg/L), retarded the embryo hatching (1-25 mg/L), reduced the body length of larvae, and caused tail malformation after the 96 hpf exposure. Zn-(dis) only partially contributed to the toxicity of nano-ZnO. This research highlights the need to further investigate the ecotoxicity of nano-ZnO in the water environment.
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